安卓MPAndroidChart绘制多层级的堆叠条形图

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="这是一个柱状图"
            android:gravity="center"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <com.github.mikephil.charting.charts.BarChart
            android:id="@+id/barChart"
            android:layout_width="match_parent"
            android:layout_height="150dp" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="这是一个堆叠条形图"
            android:gravity="center"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <com.github.mikephil.charting.charts.BarChart
            android:id="@+id/duiDieChart"
            android:layout_width="match_parent"
            android:layout_height="150dp" />
    </LinearLayout>
</LinearLayout>

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        BarChart duiDieChart = findViewById(R.id.duiDieChart);
        duiDieChart.getDescription().setEnabled(false);
        duiDieChart.setMaxVisibleValueCount(40);
        // 扩展现在只能分别在x轴和y轴
        duiDieChart.setPinchZoom(false);
        duiDieChart.setDrawGridBackground(false);
        duiDieChart.setDrawBarShadow(false);
        duiDieChart.setDrawValueAboveBar(false);
        duiDieChart.setHighlightFullBarEnabled(false);
        // 改变y标签的位置
        YAxis leftAxis = duiDieChart.getAxisLeft();
        leftAxis.setDrawGridLines(false);
        leftAxis.setAxisMinimum(0f);
        duiDieChart.getAxisRight().setEnabled(false);

        XAxis xLabels = duiDieChart.getXAxis();
        xLabels.setDrawGridLines(true);
        xLabels.setPosition(XAxis.XAxisPosition.TOP);

        Legend l = duiDieChart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
        l.setDrawInside(false);
        l.setFormSize(8f);
        l.setFormToTextSpace(4f);
        l.setXEntrySpace(6f);

        ArrayList<BarEntry> weiZhangZhanBi = new ArrayList<>();
        for (int i = 0; i <= 5; i++) {
            float a = new Random().nextInt(400);
            float b = new Random().nextInt(400);
            weiZhangZhanBi.add(new BarEntry(i, new float[]{a, b}));
        }
        BarDataSet set1;
        if (duiDieChart.getData() != null &&
                duiDieChart.getData().getDataSetCount() > 0) {
            set1 = (BarDataSet) duiDieChart.getData().getDataSetByIndex(0);
            set1.setValues(weiZhangZhanBi);
            duiDieChart.getData().notifyDataChanged();
            duiDieChart.notifyDataSetChanged();
        } else {
            set1 = new BarDataSet(weiZhangZhanBi, "年龄群体车辆违章的占比统计
");
            set1.setColors(getColors());
            set1.setStackLabels(new String[]{"有违章", "无违章"});
            ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
            dataSets.add(set1);
            BarData data = new BarData(dataSets);
            data.setValueTextColor(Color.WHITE);
            duiDieChart.setData(data);
        }
        duiDieChart.setFitBars(true);
        duiDieChart.invalidate();
    }
}